Countersink tool



FIG. 1 is a top view of a countersink tool in accordance with my invention;

FIG. 2 is a front side view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left end view thereof;

FIG. 6 is a right end view thereof; and,

FIG. 7 is a perspective view thereof. 

The ornamental design for a countersink tool, as shown and described. 